As the Fans have some fancy LED flickering, because of this I am having a hard time to eyeball this. I also wonder if the irregularities are triggered because of the LED flashing. I mean its PWM and I don't know where the powering of the LEDs is taken from. I leave the fan speed on "Auto" all the time. But my Fractal Torrent has pretty good Airflow which is linked to the CPU temp, so I don't see a lot of high temperatures - even on games like Cyberpunkt 2077.